- https://eo.wikipedia.org/wiki/Speciala%C4%B5o:AboutTopic/Q110649 does have a "Create an article" button,
- https://eo.wikipedia.org/wiki/Speciala%C4%B5o:AboutTopic/Q1106420 does not.
Note that the page does have the title "About topic", because the Item does not have an Esperanto label. Because of how the code is currently arranged (see https://phabricator.wikimedia.org/diffusion/EARP/browse/master/includes/AboutTopicRenderer.php;19a73e13220453c4ba9d012b3515e9e36b36297c$101), the "Create an article" button is not shown.
- Why not show the button, even if there is no label in the local wikis language? A popup appears, asking for a title. The default can be empty. The only reason I can think of to not have this button is to enforce people to edit Wikidata first. Personally I don't think this is good.
- The button also disappears if the article is protected. But this check is done using the current label, not the title the user is going to enter in the dialog. This appears to be wrong. However, I can think of a reason why this behavior is good: If a local community decided to block an item for creation, based on the label the item haves, no article should be created, not even with a different title.
(Note: The bug that the CSS does not load is fixed in https://gerrit.wikimedia.org/r/316570.)